how can I change the font size in a figure that have more than 2 axis?

I have a figure that has more than 2 axis ( it has so called children). How can I change the font size for all the numbers and the texts in the figure?

the code bellow changes only the fontsize from the 2 main axis.

    set(gcf,'paperunits','centimeters');
    set(gcf,'paperposition',[1 1 a(1) a(1)*(1/a(2))]);
    textobj=findobj('type','test');
    set(textobj,'fontunits','points');
    set(textobj,'fontsize',11);
    set(gca,'fontsize',11);
    set(findall(gca,'type','text'),'fontsize',11);
    set(findall(gcf,'type','text'),'fontsize',11);

Answer 1

[Walter Roberson]

You have

textobj=findobj('type','test');

with 'test' instead of 'text'

[Mohammad]

hey! how did you see that :D Thank you!! but I've corrected that. the main problem is solved but still the other axis don't change!

[Walter Roberson]

You start with using findobj() but your later calls are findall(). findobj() defaults to starting with the root object, 0, but it does not find hidden objects. Depending on how you created your plots, some of the axes might be hidden objects; that happens for legend axes for example. findall() would be more robust.